Legionella and Legionnaires' disease

This website provides practical advice and guidance to control the risks from exposure to Legionella in man made water systems.

This information will help employers and those with responsibility for the control of premises, including landlords, understand what their duties are and how to comply with health and safety law.  It applies to premises controlled in connection with a trade, business or other undertaking where water is stored or used, and where there is a means of creating and transmitting breathable water droplets (aerosols), thus causing a reasonably foreseeable risk of exposure to legionella bacteria.

What is Legionnaires' disease?

Important information

Updated 18 February 2014 - For users and suppliers of water treatment systems that use elemental copper for legionella control ie copper ionisation systems, important information on the European Commission's decision regarding the use of copper in legionella control.

Update on these systems

Updated 2022-03-17